Expanding reamer



(No Model') V. MOESLBIN.

BXPANDING BEAMER.

Patented Oct. 3, 1882.

Unire Sra'rns 'Artnr y i'fA'LnNTNn MonsLniN,

EXPANDING REAVIER.

SPECIFICATION forming part of Letters Patent No. 265,272, dated October 3, 1882.

(No model.)

` To all whom it may concern:

Be it known that I, VALENTINE MoEsLniN,

a citizen ot' Germany, residing` in Brooklyn,

Kings county, in the State of New York, have invented certain new and uset'ul Improvements in Expanding Beamers, ot' which the following is a specitication.

My improved reamer may be. made in many Y sizes and used for many purposes where it is desired to smooth, true, straighten, bevel, or

enlarge holes. It may be formed with dit'ercnt numbers ot' slots and cutters. l will describe it as made ot' small size and formed with one slot, and provided with two cutters adapted [5 to finish straight cylindrical holes.

The accompanying drawings form a part of this speciication, and represent what I 'conider the best means of carrying out the invention.

Figure l is a side view, and Fig. 2 is a central longitudinal section. Figs. 3 and 4t represent a modification. Fig. 3 is an elevation, and Fig. 4 is a central longitudinal section. Fi g.5isa cross-section through the form shown in Figs. 1 and 2. Figais a cross-section showing a modification in which t'ourcutters areeinployed. Fig. 6 is a central longitudinal section, showing a modification adapted for countersinking or producing tapering-ends ot' holes.

Similar letters indicate corresponding parts in all the figures.

Iprovidea screw with a conical point mounted in the axis of the arbor or reamer-bar. I produce a carefully-tinished slot through the bar at the center of its length, or at any other convenient point in its length, and mount therein two outters,.each carefully formed of a proper thickness to exactly till the width of the slot throughout a great portion of its length. The ends nearest the screw are forced apart to a greater or less extent by the conical point ofthe screw, which is driven inward to adjust the cutters outward, and is drawn out to relax the force on the cutters and allow 5 them tomove inward. Each cutter is, at the end farthest from the adjusting-screw, reduced to a little less than halt' the thickness ot' the slot, and the two cutters are applied side by side at that point, and are pivoted together and to the reamer-bnr. 1t follows that the 5o main ett'ective port-ion ot' each cutter is adj usted outward and inward by the screw, while one end of each Glitter is hinged to thel bar by means ot' the bolt. rlhe bolt is screw-threaded, andv can be easily removed to allow the cutters to be taken out for grinding or alterations.

ln the drawings, A is the reamer-bar, and a a long slot, with exactly-parallel sides, extending through the center of A.

Bis a bolt or transversepin, extendingacross 6@ the slot through the thin superposed ends ot' the cutters D.

O is an axial screw, having at its outer end a convenient head for engaging it to effect the required turning' motion i'or adjusting in either 65 direction. lts inner end, O', is conical. The ends ot the cutters O adjacent to the conical end O ot' this screw are properly formed to match to and be forced outby the conical point ot' the screw O, and turning the screw O 7o in the direction to l'orce it in serves to force the cutters outward. The outer faces serve as the cutting-ed ges, and are carefullyground with the Aproper bevel. They extend just sufliciently beyond the exterior of the reauier-bar A, and the bar being strongly turned by a lathe or other means, the cutters reain the hole in a sewing-machine, or any other machine in which the reamer-bar may be operated.

Near one end or" the reamer-barA isa hole, a', 8o which receives a transverse pin engaged with the face-plate ot' a lathe. (Not represented.) The opposite end ot theV reamer-bar cannot be thus equipped by reason ot' the presence of the adjusting-screw C in the center. I propose to simply square that end 0r to liatten one side thereof:1 to afford facilities for getting hold of it with any suitable wrench or coupling, and giving the reamer-bar the required rotary motion. 9o

The main portion of the slot ft may be effected by milling-tools. The portion not removed by the milling-wheel may be removed by tiling with a thin tile, orby any other suitable tool. The cutters D are of such thickness as to exactly ll the slot a without any rattling or looseness. The contour of the cutters in any given case may be determined by trial. Such form should be adopted as will act efticiently when the cutters are forced out or expanded to the proper extent.

My improved reamer may be operated by hand, either end being inserted foremost in the hole. It the end having the hole a is uppermost, the bar may be engaged by inserting a hard wire to extend through the hole a, and the bar may be turned either by such wire di rectly, or by a handle to which the wire or au equivalent pin may be connected. When for any reason it is preferred to work the bar with the other end uppermost the end then presented at the top may be engaged by a transverse handle havinga pinching-screw or other device to take hold of the squared or partially squared end ofthe bar A there shown.

The screw C may be seized byaforked wrench, or by any suitable tool, to adjust it in either direction.

Modifications maybe made in the forms and proportions. l can use only one cutter, D, and form the opposite part to simply make a bearing ou the opposite side of the tool; or I can use four or other desired number ot' cutters.

A moditcation to which I attach much importance is shown in Fig. 4. Here the cutters l) l) are both madenarrow and with an internal tapering bearing near each end to receive corresponding conical surfaces on the screw C. I make the holes in the thin ends of the cutters ohlongin the direction transverse to thelength. 'Ihis allons that portion of the cutter as well as the other end to he adjusted outward and inward, it desired. The long holes receiving the pin B allow each cutter a limited amount of motion radially at that end; but it is essential to success that the thickness ot' the main portion of each cutter be such as to closely till the slot a. IThe screw C in this moditication is formed with two conical bearings, C C2, to

act on the two ends of the cutters, as will be understood. In this modification, turning the screw C forces out both ends of each cut-ter D, or working the screw in the opposite direction allows the cutters D to move inward not only at the end adjacent to the screw, but also along the whole length of each. In this modification, or in the form first shown, the pin or pivot B may be omitted. I prefer to keep it in place as a means of preventing the cutters from hecoming detached altogether from thebar. The hole in each cutter in which the pin stands may be made long enough to allow the slight adjustments required.

The form of the device shown in Fig. Gis usel'ul in preparing the bearings for what are known as compensatingjournals for the iiywheels ot'sewing-m achines. lIhey maybe used in any situation where a tapering enlargement is to be produced at the end of a hole. The degree of the ta per of thehole may be changed within narrow limits hy turning the screw C so as to force the free ends of the cutters l) farther apart or to allow them to draw nearer together.

The reamer described, having the slotted bar A a., with one or more cutters, D, fitted therein and connected by an axial piu or pivot, B, in combination with each other and with an axial screw, C, having a tapering bearing, U', adapted to serve as herein specified.

In testimony whereof I have hereunto set my hand, at New York city, New York county, New York, this 21th day of June, 18S2, in the presence ot' two subscribing witnesses.

VALENTINE MOESLEIN.

\Vitnesses:

ALBERT M. SoHUoK, MAX COHEN. 

